Comparison of vegetation

In a special way, I wish to apologise for my reader for my long silence. I was building a career/life that took every ounce of my strength and time. Hopefully though, I shall begin to share with you some original researches, observations and reflections on the Nigerian environment as I habitually did. 

For this post, I wish to present to you this excerpt from a tweeter handle of UNEP.

https://twitter.com/UNEP/status/1484118565221453827?s=20

 https://twitter.com/UNEP/status/1484118565221453827?s=20

Loss of the Red soil

The picture to the left shows the front of a residential house of an average wealthy man in my town. The floors within and in front of the building are usually 100% impervious, due to the fact that they are completely cemented as this is what is in vogue for the wealthy. It is as if any vegetative cover or presence is viewed as dirt or a sign of poverty. The right-hand side picture shows the luxurious vegetative cover that my town enjoys but all of it is quickly cleared without consideration when a new edifice is in the balance.

It is no longer new to us that when rain falls a good amount of it naturally sinks into the ground while some run off or are eventually evaporated. However, in a rainforest zone such as my town with abundance of rainfall, the impervious surfaces coupled with the built-up areas make the amount of run off that will be generated a significant ecological problematic. 

This is the hapless state of our poor red soil and my careful investigative observations have linked this to the increasing number of impervious surfaces in my town (Adazi-Nnukwu, Anambra State, Nigeria). So, whenever the average wealthy townsman or woman decides to put up their building, not only is the vegetation completely cleared, the impervious surfaces increase, the volume of the runoff generated goes up and the velocity of flow of the runoff becomes so erosive.

The amount of soil lost is enormous and costly and it takes only one rainy season for the road to be rendered "un-motorable". When those in-charge of the seasonal maintenance of the road (usually before Christmas) come to work on it, they merely cover the potholes with laterites or more red soil excavated from other geographical location, usually an upland. Since the road maintenance is unsustainably executed, the red soil will be washed away again at the next rainy season leaving the road even worse than before. And as this upland soil excavation is repeated, the relatively ecological stable upland is exposed to other problems such as landslide, sand flow and eventually full blown erosion.

Imagine what vegetation can do to salvage the situation. Even in this deplorable state, the picture below shows that the runoff is powerless against vegetation. The runoff snake around in its attempt to avoid the vegetation but ferociously feeds on the totally exposed red soil catering tons away.

 LET'S GO GREEN PEOPLE !

The red soil of Adazi-Nnukwu

This is the southeastern part of Nigeria precisely Adazi-Nnukwu. Here, the soil is reddish due to the oxidation of the iron II present in the soil to iron III. This our beautifully coloured soil is also very easily washed away especially when not protected by the native vegetation. Unfortunately, the pressures from urbanization and economy have not only led to the disappearance of the taller vegetation but of also the grass-coverings of the frail red soil.

The picture above shows how the massive loss of our soil begin. First from small hallows then to deeper gullies until the roads degenerate to gully sites for visiting tourists. There is, however, a need to follow through with any development on our land and ensure its sustainability. For instance, when our community decides to use a piece of land as road for transportation, it is necessary to ensure that a proper tarred road with sufficient drainage channels are constructed to avoid soil loss (erosion). If on the other hand, they feel unprepared for the tarred roads then there will be need to ensure that the vegetation remain in place as there will be no other option considering the susceptibility of the red soil to the agents of erosion.

I shall deal with this in details subsequently.

The Nigerian environment is a unique one owing to many factors which shall be dealt sufficiently with in my subsequent articles. It, therefore, suffices to say that the grass-root knowledge of the Nigerian environment is inalienably significant to the globe as we all together battle the ongoing and unprecedented turmoils of our ecosystem.